Rack



FIG. 1 is a perspective view of a rack showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The break lines shown in FIGS. 1, 2, 3, 6 and 7 are not part of the claimed design and represent that no particular length is claimed. 

CLAIM The ornamental design for a rack, as shown. 